Method of sealing packages



Dem Z L L. WILCQX ETAL 2,306,581

METHOD OF SEALING PACKAGES 2 Sheets-Sheet 'l Filed .qu z, 1940 7 M V441/ mvsw'rons' HTTORNEYS.

Dec. 29, 1942. 1.. WILCOX ETAL 2,305,531

' METHOD OF SEALING PACKAGES Filed Jul 2,. 1940 2 SheetsSheet 2 (LL/II 111/ wrap/v; vs.

Pat'enteci Dec. 2 9, 1942.

2,306,581 METHOD or SEALING PACKAGES Isaac L. Wilcox, Fulton,

man, Cleveland, Ohio, Falls Corporation, Fulton, N. Y.,

of New York N. Y., and Victor J. Silliassignors to Oswego a corporationApplication July 2, 1940, Serial No. 343,594

2 Claims.

ticularly economical structure which may be hermetically sealed toafford complete protection to,

the contents of the package.

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the "accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure 1 is a side elevational view, partly in section, of aicontainerembodying my invention illustrating. the contents arranged in the linerbag, but the bag not being sealed.

Figure 2 is a fragmentary side elevational view of the top portion ofthe container illustrating the manner in which the bag is sealed.

Figure 3 is a top plan view of the arrangement shown in Figure 2.

Figure '4 is a vertical sectional view of the top portion of thecontainer illustrating the bag in sealed condition and including theprotective disk.

Figure 5 is a vertical sectional view of the top portion of thecontainer with the upper portion of the bag shown in elevation andincluding the protective disk positioned on the top of the bag.

Figure 6 is a view, similar to Figure 5, illustrating the packagecompletely sealed.

Figure 'I is a top plan view of the container with the slip cover of thecasing removed.

The package consists of a relatively stiiI outer casing including acylindrical body Ill into one end of whichis secured a bottom member Theupper end of the body is provided with a metallic ring member i2 whichserves to stiffen the upper portion of the casing and aids in securing aslip cover thereto. A bag l3 of thin sheet impervious material, such asPliofllm, is arranged inthe casing. The bag is initially of appreciablygreater length than that of the easing with the upprportlon H of the bagextending upwardly beyond the top edge of the casing, see Figure l. Thebag l3 provides an impervious proper adhesive.

and liquid tight liner which may behermetically sealed as hereinafterexplained.

-' The bag I3 is filled, as indicated at l5, Figure l.

Thereafter, the top edge of the bag is gathered or arranged in a flatformation l6 and is sealed. If the bag I3 is formed of heat sealingmaterial, such as Pliofilm, the flat formation -|6 may be sealed by theapplication of heat. If th' bag-is formed of a material which is not'ofitself heat sealing, it may be sealed by the application of a Asillustrated in Figure 2, the flat formation It is arranged upon a platenor support l1 arranged across the top edge of the casing. The bag issealed by means of a suitable heating iron l8, as for example, a heatedflatiron. I The extending portion H of the sealed bag is provided with asmall aperture 20 arranged somewhat in the vicinity of the top edge ofthe casing. The purpose of the aperture 20 is to permit the escape ofair trapped ing the flat format ion itself forming a fold 2| extendingtransversely across the casing. Thereupon the vent aperture 20 is sealedin the same-manner as the top of the bag, that is by the application ofheat or adhesive. In heat sealing, it is only necessary to touch theaperture. with'a 'hot element such as a rod to seal off the vent due tothe fact that the aperture need only be of small dimension. Due to thefact that the ,bag was initially of cylindrical form, the fold 2| is ofappreciably greater length than the diameter of the casing and thereforetheends of the fold 2| terminate in ears or tabs 22.

A protective disk 23 is positioned upon the top of the sealedand foldedbag; as illustrated in Figures 5, 6 and "I, and thereafter the tabs 22are folded inwardly overlying the top surface of the disk 23, asindicated in Figures 6 and '7. Previous to the insertion of the disk 23,the aperture 20 is effectively sealed, whereby the bag l3 forms ahermetically sealed container for the contents placed therein.

The package'is completed by the application of a slip cover 25 to theupper end of the casing and if the contents in the container is of appreciable weight, the lower end of the casing may be reinforced by a disk26 and a slip cover 21.

What we claim is:. I

1. In the method of sealing a package consisting of a fibrous casing anda liner bag of impervious material arranged in the casing and providedwith a small vent aperture in the upper portion of the bag; which methodcomprises arin the extended portion of the bag, the air being expelledby fold- IS a number of times upon ranging the open end of the bag inflat formation, sealing the top edge of the bag, expelling the air fromthe upper portion of the bag through said vent and subsequently sealingthe same, folding the top sealed portion of the bag to position the flatformation adjacent the top of the contents, folding the ends of saidflat formation inwardly and applying a slip cover to the top of thecasing.

2. In the method of sealing a package consisting of a fibrous casing anda bag of impervious material arranged in the casing; which method 10applying a slip cover to the top 01 thecasinx.

ISAAC L. WILCOX. VICTOR J. SIULmAN.

